A common pattern to check if a certain device exists (e.g. in config_distro_bootcmd) is to use: <interface> dev [device]
Implement host dev [device] so this pattern can be used for sandbox host devices. Signed-off-by: Sjoerd Simons <[email protected]> --- common/cmd_sandbox.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/common/cmd_sandbox.c b/common/cmd_sandbox.c index 4286969..7447d43 100644 --- a/common/cmd_sandbox.c +++ b/common/cmd_sandbox.c @@ -10,6 +10,8 @@ #include <sandboxblockdev.h> #include <asm/errno.h> +static int sandbox_curr_device = -1; + static int do_sandbox_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { @@ -124,3 +126,49 @@ U_BOOT_CMD( "sb commands use the \"hostfs\" device. The \"host\" device is used\n" "with standard IO commands such as fatls or ext2load" ); + + +static int do_host_dev(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + int dev; + char *ep; + block_dev_desc_t *blk_dev; + int ret; + + if (argc < 2 || strcmp(argv[1], "dev")) + return CMD_RET_USAGE; + + if (argc == 2) { + if (sandbox_curr_device < 0) { + printf("No current host device\n"); + return 1; + } + printf ("Current host device %d\n", sandbox_curr_device); + return 0; + } + + dev = simple_strtoul(argv[2], &ep, 16); + if (*ep) { + printf("** Bad device specification %s **\n", argv[2]); + return CMD_RET_USAGE; + } + + ret = host_get_dev_err(dev, &blk_dev); + if (ret) { + if (ret == -ENOENT) + puts("Not bound to a backing file\n"); + else if (ret == -ENODEV) + puts("Invalid host device number\n"); + + return 1; + } + + sandbox_curr_device = dev; + return 0; +} + +U_BOOT_CMD( + host, 3, 2, do_host_dev, + "Set or get current host device", "dev [dev] - Set or retrieve the current host device" +); -- 2.1.4 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
